ToolVet
13trust / 100

Rails Compare

by StablecoinPulse in Onchain & crypto

x402 APIFailing, checked 6 h ago

Payment-rail comparison across stablecoin-native L1s (Plasma, Circle Arc, Stripe/Paradigm Tempo, Tether Stable) and incumbent chains (Tron, Solana, Base) — fees, finality, and ecosystem maturity, grounded in live search and cited.

GET
https://stablecoinpulse.theaslangroupllc.com/api/rails-compare
Price
$0.25
per call in USDC
Uptime
0.0%
last 30 days
Response time
-
no timed checks yet
Last check
Failed
6 h ago, next any minute now

Run a free test callHow to call it

Reliability

All checks passedSome failedAll failedNot checked

Latest check failed 6 h ago: Amount "0.25" is not in atomic token units

Status and outage history · Atom feed · Watch with other listings

How to call it

GET https://stablecoinpulse.theaslangroupllc.com/api/rails-compare

Each call costs $0.25 in USDC on Polygon, paid with the request over x402.

Run a free test callOne unpaid request, the way an agent sends it. You see the payment challenge it gets back. Nothing is charged.

Example request

From the listing.

GET https://stablecoinpulse.theaslangroupllc.com/api/rails-compare?rails=plasma%2Carc%2Ctron

Parameters

ParameterTypeRequiredDescription
langstringNoe.g. en, es, fr, de, ja, zh, ko, pt, ar (default: en; forwarded to the model, not strictly validated)
railsstringNoComma-separated subset of rail ids to compare, e.g. plasma,arc,tron (default: all 7 registered rails)

Example response

The provider's example. We can't check it without paying.

{
  "rails": [
    {
      "category": "stablecoin-native-l1",
      "id": "plasma",
      "name": "Plasma",
      "status": "Mainnet live since 2025-09-25"
    }
  ]
}

Call it from code

The curl command shows the payment challenge. The JavaScript and Python versions pay and call, and never pay more than $0.25.

curl: see the payment challenge
# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i 'https://stablecoinpulse.theaslangroupllc.com/api/rails-compare?rails=plasma%2Carc%2Ctron'

# x402 v2 sends the challenge base64-encoded in the PAYMENT-REQUIRED header (v1 sends it in the body).
# To read the header:
curl -sS -g -o /dev/null -D - 'https://stablecoinpulse.theaslangroupllc.com/api/rails-compare?rails=plasma%2Carc%2Ctron' \
  | grep -i '^payment-required:' | cut -d' ' -f2 | tr -d '\r' | base64 --decode
JavaScript: pay and call
// npm i @x402/fetch @x402/evm viem
import { wrapFetchWithPayment, x402Client } from "@x402/fetch";
import { registerExactEvmScheme } from "@x402/evm/exact/client";
import { privateKeyToAccount } from "viem/accounts";

// Pays at most $0.25 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.25" });
registerExactEvmScheme(client, { signer: privateKeyToAccount(process.env.EVM_PRIVATE_KEY) });
const pay = wrapFetchWithPayment(fetch, client);

// Not sure it's safe to pay? ToolVet checks it first for $0.005. Pay for that from a separate
// client: this one is capped at $0.25 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fstablecoinpulse.theaslangroupllc.com%2Fapi%2Frails-compare
const res = await pay("https://stablecoinpulse.theaslangroupllc.com/api/rails-compare?rails=plasma%2Carc%2Ctron");
console.log(res.status, await res.text());
Python: pay and call
# pip install "x402[requests,evm]"
import os
from eth_account import Account
from x402 import x402ClientSync
from x402.http.clients import x402_requests
from x402.mechanisms.evm import EthAccountSigner
from x402.mechanisms.evm.exact.register import register_exact_evm_client

# Pays at most $0.25 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.25"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.get("https://stablecoinpulse.theaslangroupllc.com/api/rails-compare?rails=plasma%2Carc%2Ctron")
    print(res.status_code, res.text)

Security scan

No findings

We scan names, descriptions and tool definitions for hidden instructions and other prompt-injection patterns.

Recent checks

WhenResultHTTPTimePrice
6 h agoAmount "0.25" is not in atomic token units402218 ms$0.25
11 h agoAmount "0.25" is not in atomic token units402208 ms$0.25
17 h agoAmount "0.25" is not in atomic token units402290 ms$0.25
23 h agoAmount "0.25" is not in atomic token units402221 ms$0.25
28 h agoAmount "0.25" is not in atomic token units402239 ms$0.25
Show 5 older checks
34 h agoAmount "0.25" is not in atomic token units402266 ms$0.25
39 h agoAmount "0.25" is not in atomic token units402262 ms$0.25
44 h agoAmount "0.25" is not in atomic token units402238 ms$0.25
2 days agoAmount "0.25" is not in atomic token units402196 ms$0.25
2 days agoAmount "0.25" is not in atomic token units402262 ms$0.25